Machine for rolling tapered disks



Patented Jan. 13, 1931 UNITED STATES AIENT oFFica j i :oEN w. SMITH, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR. anew WHEEL COMPANY, or PHILADELPHIA, PENNSYLVANIA,v A conroaA'rIoN or PENNSYL- VANIA.

Original application filed September 4, 1920, Serial No. 408,231. Divided and this application filed.

MACHINE r03 ROLLING .TAI' REI) msirs October as, 1928. sem b. 144,954.

The invention comprises a machine for rolling suitable blanks into thin disk-like forms of any desired section and is a division of my co-pending application,-Serial 5 No. 408.231, filed September 4, 1920, for Process and apparatus for rolling metallic disks.

An object of my invention'is to providea machine in which such thin disk-like forms may be produced without the attendant buckling and distortion heretofore thought unavoidable.

Another object is the provision of a machine adapted to both hot and cold rolling, but particularly suited to the former use.

A third object is the-provision of a machine by means of whichv a better finish can be obtained than by previous devices.

These objects are attained, and others will be made apparent by the following detailed description and the drawing which is appended.

The drawing represents somewhat diamgrammatically an elevation of a form of the )rnvention, with some parts shown in sections. The frame 9 of the machine supports and guides a cage or holder 11in which the rollers 1 are suitably journaled by means of their shafts 7. Guides or bars 20 (only one of which is shown) are carried by posts 21, attached to the frame. Slidably mounted on these guides are the roll carriers 22, which provide suitably journaled bearings for the rolls 2. A shaft 25, threaded right and lefthanded to engage correspondingly threaded bores of the carriers 22, is journaled in members connecting the guides 20, and provided with an operating crank 26. Rotation of this shaft in one direction causes the carriers to separate; reversal causes them to approach each other.

The rolls 2 are of cylinder-oonical formation, comprising a relatively narrow cylindrical tread portion, which is the active rolling surface, and a wider conical portion, for a purpose hereinafter specified.

The lower sup orting rollers 1, which support and give orm to the blank B being rolled, are capable of movement to and from the rolls 2 by reason of the method of supporting their housing in the frame 9. A

threaded sleeve, lfi is carried ina central threaded aperture of the frame. Sleeve and housing have'abutting shoulders in contact, so that rotation of the sleeve, through handle 17 inserted in one of a plurality of holes 18, serves to force the housing and rollers 1 toward rolls 2' or to permit the return movementaway from-thesaid rolls 2. Rollers 1 aredriven through shafts 7, by a-suitable source of power, through flexible couplings of the" conventional type, well known inrollingmill practice. ny suitable number of rollersl may be used, ,f

'A clamping device, comprising parts and 6, is provided to locate the blank with respect to the rolls and to permit and guide its rotationwhile being rolled. Screwfconneetions between the parts 3 and .6 produce this clamping action, while a suitable bearing of part 6 in sleeve 16 affords the necessary freedom for rotation.

' Starting with rolls2 in their inward positions, and with rollers 1 and rollers. 2 separated,a blank. (hot or cold) is placed in the machine and secured by the clamping means. I

Rollers 1 are put in motion(or continue in motion constantly) the cage is brought up to the rolls 2, and suflicient pressure applied by handle l'Zto effect the desired rolling' action.

Rolls 2 are then separated, causing a rolling and. spinning, treatment of the blank which reduces it to the desired shape and finishes itsupper surface. i

It will be noted that rolling takes place only in a. narrow zone under thecylindrical tread portions of the rolls 2. The metal is thus free to be gradually displaced Without strain or buckling. In this device, as distinguished from that claimed in the parent I application, the amount of metal undergoing working at any given time, is still less, given the same size of metal-Working rolls 2. This is due to the use of a roller, instead of a platen or turn-table as a support. The theoretical contact is therefore along two short, narrow lines on opposite sides of the disk. As the free edge of the blank curls upward during the process, it is guided and gradually fiattened by the conical portions of the rolls 2.

It will further be noted that the actual traversible radially over said blank to sin iulcontact of the blank with the rolls occurs under the narrow cylindrical portion of the rolls 2. Thus there is little 0 portunity for the rapid conduction of heat romthe blank (when a heated blank is to be rolled) through having large areas of contact with adjacent masses of cold metal.

From the foregoing description-it is apparent that the lower rollers 1 determine the finished shape of the disk. Therefore,

the substitution of one set of lower rolls for v another Will'cause a corresponding change in the product, andthereby the resulting disk can be made of any desired configuration;

While a specific form of the invention has been illustrated and described, the invention is not to be limited thereto, but only by the scope of the appended claims, I claim r i 1. Arolling millcomprising a conical oll-"j er for supporting a relatively thin blank to be rolled and fixedradially as respectsthe axis of the blank and a narrow faced roll "aneously roll and spin the blank.

2. A machine substantially as described, comprising separable narrow faced rolls, si-

multaneously movable in opposite directions along a diameter of the ,relatively thin disk to be rolled to spin and roll the same, and conical rollers eachopposed to one of the said rolls and having elements oftheir conical surfaces substantially aligned, and fixed radially as respects the axis of the disk to herolled' 3. A mill for rolling relatively thinmetal blanks comprising a pair of narrow-treaded rolls transversible radially of the blanks to roll and spin the same, each of said rolls hav-i' ing a conical portion adjoining its' narrow tread, supporting means for said'rolls permitting their mutual separation and approach, means for presentingand rotating a blank disk for treatment by'said rolls com prising a cage bearing conical rollers having elements of their faces defining the surface to which one side of the blank disk is' to be formed and relatively fixed radially as respects the axis of the blank, and means for' driving said conical sup orting rollers and causing them to approac and separate from the said rolls.

In testimony whereof he hereunto "aiiixes' his signature.

JOHN SMITH. 

